How to Configure a Comcast Modem

By Ann Olson

After a Comcast representative sets up cable service at your home, use the items he gives you, including the Ethernet cable, USB cable and installation CD, to make your computer Comcast-compatible. It may take some time to set up all the components, however, so set aside an hour or two for the modem setup.

Things You'll Need

  • Coaxial cable
  • Ethernet cable
  • USB adapter
  • Comcast installation CD
  • Comcast modem
  • Modem power cord

Modem Setup

Step 1

Connect one end of the cable to a cable outlet. Connect the other end to the cable port, located in the back of the Comcast modem. Twist the end around until it is completely tight.

Step 2

Plug the power cord into an electrical outlet. Plug the other end into the port, located in the back of the modem. If the modem has a power button, press it.

Step 3

Plug the end of the Ethernet cable into the Ethernet port, located in the back of the Comcast modem. Plug the other end into the Ethernet port in the processor, located in the back of the computer near the USB ports.

Step 4

Insert the Ethernet installation CD. Follow the instructions on the CD to install the Ethernet's driver. Exit the program after installation.

Step 5

Plug the square-shaped end of the USB adapter into the USB port in the back of the Comcast modem. Plug the rectangular end of the USB adapter into an open USB port in the computer.

Installation CD

Step 1

Insert the Comcast Cable Modem Installation CD. A pop-up installation screen will launch. Press "Next" and answer "Yes" to any questions about the installation process.

Step 2

At the license agreement screen, select "Accept" at the bottom of the screen. Click "Next."

Step 3

On the next screen, type in any name in the "Username" text box. Enter any password in the "Password" text box. Click "Next."

Step 4

The installation will begin. If it finishes, click "Finish." If it says it failed, exit the program, restart it and go through the steps again. If it is still unable to start the installation, call Comcast's technical support for additional assistance.